ErrorCodeDoctor
Bosch · Washing Machine

Bosch Washing Machine E18 / F18 error code

Difficulty: Medium · Cost: $0–$80 · Duration: 20–30m

The E18 or F18 error means your Bosch washing machine cannot drain properly. The drainage hose is blocked, kinked, or the drain pump is clogged. This requires checking and cleaning both the drainage hose and the pump. Use caution — residual water may be very hot. Set the program to OFF and unplug the machine before performing any maintenance.

Common causes

  • Drainage hose is kinked or blocked
  • Drain pump is clogged with lint, coins, or debris
  • Pump cap is not correctly fitted

How to fix it

  1. 1

    Set the program to OFF and unplug the machine — residual water may be very hot

  2. 2

    Check the drainage hose for kinks and make sure it is installed without bends

  3. 3

    Loosen the hose clip on the siphon connection, remove the drainage hose carefully, and clear any blockage

  4. 4

    Clean the drain pump — open the service flap, slowly remove the pump cover to drain remaining water, clean the interior and pump housing, and make sure the impeller wheel can turn freely

  5. 5

    Reinsert the pump cover and screw it on firmly — the pump cap handle must be in a vertical position when closed

  6. 6

    Check for leaks by pouring 1 quart of water into the detergent dispenser before restarting

  7. 7

    If the error returns contact a qualified technician

Related Bosch Washing Machine error codes

1

CL

Child Lock is activated — the controls are disabled

easy
2

E:00 -18

The drain pump is blocked or obstructed

easy
3

E:00 -23

Water was detected in the base of the machine — possible leak

hard
4

E:10 / -00 / -10 / -20

The intelligent dosing system pump is blocked

easy

E18 / F18 error — frequently asked questions

What does the E18 / F18 error mean on a Bosch washing machine?

The drainage hose is blocked, kinked, or the drain pump is obstructed

What causes the E18 / F18 error?

The E18 / F18 error is usually caused by: Drainage hose is kinked or blocked; Drain pump is clogged with lint, coins, or debris; Pump cap is not correctly fitted.

Can I fix the E18 / F18 error myself?

It's possible for a moderately handy person, but budget 20–30m and expect some disassembly.

How much does it cost to fix the E18 / F18 error?

Fixing the E18 / F18 error on a Bosch washing machine typically costs $0–$80, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my washing machine with the E18 / F18 error?

In most cases yes, but it's best to address the E18 / F18 error soon — see the fix steps below to resolve it.